Malicious PDF — malware analysis report

Static analysis result for SHA-256 129b557b51e0a80e…

MALICIOUS

PDF

77.3 KB Created: 2021-04-11 09:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e27b2a5bdfd3744543498ade4819a4d SHA-1: d90ee47952cba4247ddc0aa192cd73928fc1c37f SHA-256: 129b557b51e0a80eb5cf8fe7b42c4fdb8d66458ce78e3786d5d06f830cc1a258
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dexulana.weebly.com/uploads/1/3/4/2/134234773/zuwuborezejipiraki.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/strik?utm_term=can+i+renew+my+alaska+drivers+license+online PDF link annotation
    • http://beach-fruit.fun/29671199910bpphg.pdfIn PDF document text
    • https://dexulana.weebly.com/uploads/1/3/4/2/134234773/zuwuborezejipiraki.pdfIn PDF document text
    • http://onlineeshop24.xyz/the_compound_effect_darren_hardy_audiobooktr0xg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_60579544e8bfa.pdfIn PDF document text
    • http://jonapesi.22web.org/william_shakespeare_poem_sonnet_130.pdfIn PDF document text
    • https://vafobuzegigotot.weebly.com/uploads/1/3/0/7/130775214/xalotiribupefeg-bapimeganarag-judared.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_601abe68501e3.pdfIn PDF document text
    • http://idealsit.space/financial_reporting_council_hong_kong_recruitmentat47s.pdfIn PDF document text
    • http://bit-ipo.ru/bellevue_prague_guide_michelinyokym.pdfIn PDF document text
    • http://sodahq.club/665248420112qysi.pdfIn PDF document text
    • https://tiledumojamusej.weebly.com/uploads/1/3/4/0/134096308/daronisozatesi-lemise.pdfIn PDF document text
    • http://gallery-shop.site/tadapnwkgo.pdfIn PDF document text
    • http://vafakewa.iblogger.org/kawijeguvoruxabanele.pdfIn PDF document text
    • https://nasijominazol.weebly.com/uploads/1/3/4/3/134366940/botenaxokibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pemuginikuj.epizy.com/shimano_nexus_3_speed_hub_adjustment.pdfIn PDF document text
    • http://xabogubumux.rf.gd/32800145540.pdfIn PDF document text
    • http://fupenidiwed.rf.gd/biology_101_textbook.pdfIn PDF document text
    • http://sakipipatepuwuf.rf.gd/why_walmart_failed_in_other_countries.pdfIn PDF document text
    • http://lowazuxakosilal.epizy.com/adobe_reader_dc_vs_11_free.pdfIn PDF document text
    • http://risafajafefe.rf.gd/when_does_csco_report_earnings.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/nesaxutikigatidekuga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 5308 bytes
SHA-256: 883ef4c957587f234775af397bec0fc7337aea46157335e7e8f87ea10f153fdc
font_01_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 10536 bytes
SHA-256: 8da3f70afd2c97f8bb40e961729b29f55f5a5a56dc74ea49d3fff59d6bf75680

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